Why does humidity cause a musty smell?« Back to Previous Page

After the rain last month, I noticed a musty smell coming from under my bed in the bedroom closet. It's only humid outside during the afternoon but it feels like it’s affecting our entire apartment by evening. Is there something specific I can do to prevent this moisture build-up and keep the air fresher?
Posted by Giulia Durand
Asked on February 25, 2026 5:53 pm
Humidity causes a musty smell due to the growth of microorganisms like mold and mildew. These microscopic fungi thrive in environments with high moisture levels, which can often be found in your apartment during humid weather. In Dubai, where we experience significant temperature fluctuations from day to night, it's not uncommon for condensation to form on surfaces or within cavities that may go unnoticed, such as under beds or in closets.

When the air reaches its dew point (the temperature at which moisture begins to condense), it can lead to excess moisture accumulating. This is especially problematic during the afternoon when you might experience a drop in temperature after a rain event followed by an increase later into evening. The prolonged presence of this moisture creates a favorable environment for mold and mildew growth, leading to that distinct musty odor.

To address the situation, it's crucial to improve indoor air quality and manage humidity levels effectively. Regularly inspect your home for any signs of water damage or condensation, especially in areas like under beds and closets where airflow might be limited. Ensuring proper ventilation is key – open windows when possible, use exhaust fans, and consider dehumidifiers to reduce moisture.

In Dubai's climate, which can see temperatures as high as 40°C during summer, maintaining an indoor relative humidity between 30% and 50% is ideal. Utilizing a hygrometer will help you monitor these levels accurately. If your efforts do not sufficiently mitigate the issue, it might be time to seek professional assistance for a thorough inspection and remediation plan.

Remember, in cases where mold has already established itself, addressing the problem requires more than just cleaning; it involves treating and preventing future growth. Saniservice, based out of Dubai, can offer professional guidance and services tailored to your specific needs.

Call 800-MOLDS or email hello@saniservice.com for further assistance or if you require a consultation from our expert team.
Posted by Sani Admin
Answered on February 28, 2026 1:46 am